State Street SPDR S&P 500 ETF Trust
US ˙ ARCA ˙ US78462F1030

SecuritySPY / State Street SPDR S&P 500 ETF Trust
InstitutionMercer Global Advisors Inc /adv
Latest Disclosed Ownership505,779 shares
Latest Disclosed Value $ 324,172,576
Mercer Global Advisors Inc /adv ownership in SPY / State Street SPDR S&P 500 ETF Trust

On May 15, 2026 - Mercer Global Advisors Inc /adv filed a 13F-HR form disclosing ownership of 505,779 shares of State Street SPDR S&P 500 ETF Trust (US:SPY) valued at $328,928,315 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 535,995 shares of State Street SPDR S&P 500 ETF Trust. This represents a change in shares of -5.64% during the quarter. The current value of the position is $373,037,301 USD.

Mercer Global Advisors Inc /adv has a history of taking positions in derivatives of the underlying security (SPY) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

SPY / State Street SPDR S&P 500 ETF Trust Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F STATE STR SPDR S&P 500 ETF T TR UNIT 78462F103 505,779 -30,216 -5.64 324,173 -11.07 0.4797
2026-02-17 2025-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 535,995 46,459 9.49 364,526 13.71 0.5557
2025-11-14 2025-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 489,536 489,536 320,587 0.5351
2025-08-14 2025-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 0 -457,130 -100.00 0 -100.00
2025-05-15 2025-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 457,130 1,969 0.43 251,318 -5.16 0.5765
2025-02-14 2024-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 455,161 -1,057,837 -69.92 265,002 -69.21 0.6466
2024-11-14 2024-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 1,512,998 10,873 0.72 860,599 6.56 2.0140
2024-08-12 2024-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 1,502,125 837,785 126.11 807,636 232,648.13 2.2019
2024-05-15 2024-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 664,340 -495,850 -42.74 348 -37.02 0.9882
2024-02-15 2023-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 1,160,190 765,513 193.96 551 227.98 1.6587
2023-11-15 2023-09-30 13F/A-1 SPDR S&P 500 ETF TR TR UNIT 78462F103 394,677 -12,554 -3.08 169 -6.67 0.6407
2023-11-14 2023-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 394,677 -12,554 169 0.6405
2023-08-14 2023-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 407,231 -14,672 -3.48 181 5.26 0.7165
2023-05-16 2023-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 421,903 -52,960 -11.15 172 -5.52 0.7794
2023-02-09 2022-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 474,863 878 0.19 182 -99.89 0.9095
2022-11-15 2022-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 473,985 -25,390 -5.08 169,292 -10.14 1.0047
2022-08-10 2022-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 499,375 19,951 4.16 188,389 -13.00 1.1531
2022-05-10 2022-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 479,424 -1,544 -0.32 216,527 -5.22 1.2752
2022-02-04 2021-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 480,968 4,300 0.90 228,441 11.68 1.4105
2021-11-10 2021-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 476,668 28,632 6.39 204,557 6.66 1.4288
2021-08-10 2021-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 448,036 12,494 2.87 191,786 11.10 1.4750
2021-08-10 2021-03-31 13F/A-1 SPDR S&P 500 ETF TR TR UNIT 78462F103 435,542 231,346 113.30 172,618 126.11 1.5701
2021-05-11 2021-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 435,066 230,870 172,429 1.6509
2021-02-12 2020-12-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 204,196 37,785 22.71 76,344 36.99 0.9534
2020-12-10 2020-09-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 166,411 101,133 154.93 55,729 176.86 0.8384
2020-08-10 2020-06-30 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 65,278 -94,375 -59.11 20,129 -51.09 0.3655
2020-05-18 2020-03-31 13F SPDR S&P 500 ETF TR TR UNIT 78462F103 159,653 -1,714 -1.06 41,151 -20.77 0.9057
2020-02-13 2019-12-31 13F SPDR S&P 500 ETF TR TR UNIT COM 78462F103 161,367 94,330 140.71 51,938 161.07 1.0372
2019-11-12 2019-09-30 13F SPDR S&P 500 ETF TR TR UNIT COM 78462F103 67,037 1,841 2.82 19,894 4.15 0.4679
2019-08-14 2019-06-30 13F SPDR S&P 500 ETF TR TR UNIT COM 78462F103 65,196 -1,549 -2.32 19,102 1.32 0.5063
2019-04-23 2019-03-31 13F/A-1 SPDR S&P 500 ETF TR TR UNIT COM 78462F103 66,745 66,745 18,854 0.6780
2019-04-12 2019-03-31 13F SPDR S&P 500 ETF TR TR U COM 78462F103 37,494 9,371 0.4994
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-11-14 2025-09-30 13F SPDR S&P 500 ETF TR TR UNIT Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F SPDR S&P 500 ETF TR TR UNIT Call 445,942 274,510 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.